[AdamN]

Yes - I didn't mean to imply it was only one of the OSes. Further up the comments people were talking about how memory efficiency is now more important but I was trying to make the point that with compression and virtual memory it still doesn't matter all that much even if memory is double the price.

[Delk]

If running low on memory seems to matter less now than it did a couple of decades ago, I'd rather say that's because fast SSDs make swapping a lot faster. Even though virtual memory and swapping were available even on PCs since Windows 3.x or so, running out of memory could still make multitasking slow as molasses due to thrashing and the lack of memory for disk cache. The performance hit from swapping can be a lot less noticeable now.

Of course compression being now computationally cheap also helps.